Overfull \hbox too wide in table

Question

I have the following table

\documentclass[10pt,twocolumn,letterpaper]{article} \usepackage{graphicx} \usepackage{array} \newcolumntype{M}[1]{>{\centering\arraybackslash}m{#1}} \begin{document} \section{Results} \label{Sec:results} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Table %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \begin{table}[tb] \centering \tabcolsep = 0.01\textwidth %0.18cm \begin{tabular}{| m{0.17\textwidth} | M{0.1\textwidth} | M{0.1\textwidth}|} \hline \centering\textbf{Method} & \textbf{Input} & \textbf{Accuracy} \tabularnewline \hline 3DShapeNets & volumetric & 84.7\\ Voxnet & volumetric & 85.9\\ \hline PointNet & points & 89.2 \\ PointNet++ & points & 90.7 \\ Kd-network& points & 91.8 / 90.6 \\ \hline Ours & points & ? \\ \hline \end{tabular} \caption{Classification Accuracy on ModelNet40 dataset} \label{table:ClassificationAcc} \end{table} \begin{table}[tb] \centering \tabcolsep = 0.01\textwidth %0.18cm \begin{tabular}{|m{0.12\textwidth}|M{0.1\textwidth}|M{0.15\textwidth}|M{0.08\textwidth}|} \hline \centering\textbf{Method} & \textbf{ Data} & \textbf{Permutations} & \textbf{Points} \tabularnewline \hline PointNet & & &\\ PointNet++ & & &\\ Kd-Network & & &\\ \hline \end{tabular} \caption{Challenges summary } \label{table:ChallangeComp} \end{table} \subsection{Architecture Design Analysis} \label{SubSec:Arch_Dn_Analysis} \subsection{Visualizations} \label{SubSec:Vis} \end{document}

I get a warning Overfull \hbox (... too wide) ... Why is this happening and how can I solve it ?

Please provide a full minimal working example starting with \documentclass{...} and ending with \end{document} instead of code snippets. How are we supposed to know how you defined the column type M? — campa
– campa, Commented Aug 24, 2017 at 11:39
if i changeM to m, i cant reproduce your problem. without knowing your document preamble is not possible to help you. consider above comment. — Zarko
– Zarko, Commented Aug 24, 2017 at 11:45
In a standard document that table does not produce an overfull box. If I however do \documentclass[twocolumn]{article} then I do get an overfull warning, as the table is wider than a single column. And the solution is then obvious: make the columns of the table narrower. But it's not really clear what your setup is, so please elaborate. — Torbjørn T.
– Torbjørn T., Commented Aug 24, 2017 at 11:53
In general "overfull \hbox" means that a content of a \hbox is too wide for the box. You can solve it by either reducing the stuff inside the box in question, or by increasing the box's size. — Skillmon
– Skillmon, Commented Aug 24, 2017 at 11:53

Zarko · Accepted Answer · 2017-08-25 01:01:09Z

problematic is your second table. it is wider than column width. it is possible to make it narrower, however content of table is unknown, so the obtained result probably in real document will not works.

as you can see, i change table layout. for my taste now looks better. for this i add two new packages: booktabs for rules and siunitx for S column type. i also assume that content of column header is the widest cells contents.

\documentclass[10pt,twocolumn,letterpaper]{article} \usepackage{siunitx} \usepackage{array, booktabs} \newcommand\mc[1]{\multicolumn{1}{>{\bfseries}c}{#1}} \usepackage{lipsum} \begin{document} \section{Results} \label{Sec:results} \lipsum[22] %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Table \begin{table}[htb] \centering \begin{tabular}{l l S[table-format=2.1]} \toprule \mc{Method} & \mc{Input} & \mc{Accuracy} \\ \midrule 3DShapeNets & volumetric & 84.7 \\ Voxnet & volumetric & 85.9 \\ \midrule PointNet & points & 89.2 \\ PointNet++ & points & 90.7 \\ Kd-network & points & {91.8 / 90.6} \\ \midrule Ours & points & {?} \\ \bottomrule \end{tabular} \caption{Classification Accuracy on ModelNet40 dataset} \label{table:ClassificationAcc} \end{table} \lipsum[44] \begin{table}[htb] \centering \begin{tabular}{ l l l l} \toprule \mc{Method} & \mc{Data} & \mc{Permutations} & \mc{Points} \\ \midrule PointNet & & & \\ PointNet++ & & & \\ Kd-Network & & & \\ \bottomrule \end{tabular} \caption{Challenges summary } \label{table:ChallangeComp} \end{table} \lipsum \subsection{Architecture Design Analysis} \label{SubSec:Arch_Dn_Analysis} \subsection{Visualizations} \label{SubSec:Vis} \end{document}

above mwe gives no error, no warning, no bad boxes.

WOW. Thanks. I was hoping for something simpler. In addition, I am not sure yet if the content of the column header is the widest. Maybe my best option is to make this table go across the two columns. — itzik Ben Shabat
– itzik Ben Shabat, Commented Aug 24, 2017 at 21:08

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